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3w ago

Vibrio Bacterium Confirmed as Cause of Decade-Long Sea Star Die-Off

Cultured Vibrio pectenicida underpins diagnostic development, captive breeding, ecosystem restoration

Image
Sunflower sea stars (pycnopodia helianthoides) and sea vases (ciona intestinalis) are seen in the waters in Rivers Inlet, B.C., in an undated handout photo. THE CANADIAN PRESS/Handout - Hakai Institute, Bennett Whitnell (Mandatory Credit)
Researchers have identified Vibrio pectenicida, a bacterium previously known to infect shellfish, as the cause.

Overview

  • A study in Nature Ecology & Evolution identifies Vibrio pectenicida strain FHCF-3 as the single causative agent of sea star wasting disease through controlled challenge experiments and genomic analysis of coelomic fluid
  • Researchers have established lab cultures of the pathogen, paving the way for investigations into bacterial evolution and sea star resistance
  • Field-ready diagnostic tests are being designed to detect the bacterium in both sea stars and surrounding waters ahead of reintroduction efforts
  • Ongoing research is probing how elevated ocean temperatures enhance Vibrio activity and trigger seasonal disease outbreaks
  • Conservation plans now include captive-breeding programs and targeted reintroduction strategies to restore sunflower sea stars and revive kelp forest habitats